Odpowiedź:
a/ x = 8[tex]\frac{1}{3}[/tex], b/ x = 2, c/ x = -2, d/ x = -11, e/ x = 13, f/ x = -6
Szczegółowe wyjaśnienie:
a/ 9x - 25 = 50
9x = 50 + 25
9x = 75 / : 9
x = 8[tex]\frac{1}{3}[/tex]
b/ 20x + 17 = 57
20x = 57 -17
20x = 40 /: 20
x = 2
c/ 12x + 8 = - 16
12x = -16 - 8
12x = - 24 /: 12
x = - 2
d/ 2x + 9 = x - 2
2x - x = -2 - 9
x = - 11
e/ 2x - 16 = 4x - 42
2x - 4x = - 42 + 16
-2x = - 26 /: (-2)
x = 13
f/ 14 - 2x = 5x + 56
-2x - 5x = 56 - 14
-7x = 42 /: (-7)
x = -6
